Warp stop-motion for looms.



Patented lan. 8, |901.

No. 665,59l.

v v (Appuwim mea 1m. 24. 1900.)

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No. 665,59I. Patented lan. 8, |90I.

H WYMAN Y WARP STUP MDTION FOR LDDIIS.

application' med un. 24, 1990.)

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(No Model.)

@/rf/e'sses: y 'fila /MMW H. WYMAN.

wAnP sToP manon For: Looms. (Application led Har. 24, 1900.)

Patented lan. 8, 190|.

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UNITE STATES Finca@ Artnr HORACE "/VYMAN, OF WORCESTER, MASSACHUSETTS, ASSIGNOR TO THE CROMPTON da KNOVLES LOOM WORKS, OF SAME PLACE;

SPEGLFIGATION forming part of Letters Patent No. 665,591. dated January 8, 1901.

Application led March 24, 1900. Serial No. 9,990. (No model.)

To all whom, t may concern:

Be it known that I, HORACE WYMAN, of W'orcester, county of Worcester, State of Massachusetts, have invented an Improvement in VarpSt-op-Motions for Looms, of which the following description, in connection with the accompanying drawings, is a specification, like characters on the drawings representing like parts.

The invention to be hereinafter described relates to warp stop mechanisms employed in looms to effect the stopping thereof whenever a warp-thread breaks or becomes too slack, and more particularly to such type of mechanism wherein on the occurrence of such fault in the warp an electric circuit is established or completed, which, through coacting instrumentalities, brings the loom to a stop.

For the present embodiment of my invention I have selected the general form of warp stop mechanism described and set forth in United States Letters Patent No. 631,243, wherein when a warp-thread breaks or becomes too slack a drop device or warp-detect-or falls into the path of a moving feeler and arrests the free movement thereof, thereby causing certain other instrumentalities to act to disengage the shipper from its holdingnotch and stop the loom.

In my present invention I have entirely dispensed with the instrumentalities referred to and have devised electrically-actuated devices which upon the indication of a defect in the warp-threads by dropping of a drop device or warp-detector into the path of movement of the feeler will cause an electric circuit to be established or completed, to thereby put into position a device to be struck by a moving part of the loom, and thereby be actuated to effect the stopping of the latter.

To effect a saving of the batteries or other source of electrical supply, it is desirable in such forms of warp stop mechanisms to break the circuit and cut out the electric current as soon the stopping mechanism has acted; and to this end I have provided devices which will act to automatically accomplish this desired end simultaneously with the stopping of the loom.

Other objects and advantages of the invention will hereinafter appear, and the novel features thereof be fully described in the following specification, and be definitely pointed out in the claims.

In the drawings, Figure l represents a righthand side elevation of a sufficient portion of a loom to enable the invention to be understood. Fig. l8L is a detail showing the form of drop device or warp-detector employed. Fig. lb is a detail of the binding-posts in section through which the circuit is formed. Fig. 2 is a detail, partly in section, of one end of the loom-frame, showing the shipper and its coacting parts. Figs. 3 and 3 are side and end elevations, respectively, of the automatic switch or cut-out for interrupting the circuit through the loom when the latter is stopped. Figs. 4 and 5 are enlarged details in side and rear elevations, respectively, showing the means for operating the feeler and the electric contacts. Fig. 6 is a cross-section taken through the guide-bars and the feeler and showing the drop devices in their normal position suspended by warp-threads.

In the drawings the loom-frame A, the lay A', carrying the reed a; the lay being pivoted at A6, the crank-shaft A4, having the usual cranks receiving lay-actuating connectingrods A5, the cam-shaft A7, driven from the gear A9 on the crank-shaft engaging a gear A8 on the cam-shaft, said gears being represented in circular outlinel only, the shipperhandle E, working in the slot of extension a', notched at one side and connected with the loom-frame at one end of the usual breastbeam A2, the shed-forming devices a2 and a3, the removable end piece C, having suitable guide-bars c3 and c4, said end pieces and their connected guide-bars being supported in a suitable casting B, extended across the loomframe, and the rock-shaft e6, sustained in suitable bearings e9 and carrying a vibrator or feeler e7, are or may be substantially as represented in said Patent No. 63l,243.

Herein the casting B is sustained by screws 2, inserted in cross-bars 3, said screws and other screws 4 being also extended through bearings 5, sustaining each a proper lease-rod 6, said rods also sustaining the warps near the points where the drop devices IOO 7.are suspended. The drop devices are composed of thin metal provided each, as herein represented, with a single long slot 8 to embrace a guide-bar c3 or c4, each of said drop devices at its lower end being provided with a notch 9, a slit 10 being made from the bottom of said notch into the lower end of thel slot 8, said slit being provided to enable a' dropdevice to be readily applied to a guida bar or to be removed froma guide-bar, as deshed. The slit also enables a new drop device to be put onto a warp-thread in position in case of an accident or breakage of one of.

said devices.

The side frame of the loom, preferably at:

the end adjacent the shipper-handle E, has applied to it, by means of a proper screw or securing-bolt 15,A Fig. 2, a stand 16, having an ear 17, against which normally rests atoe 18 of a dagger-carrier 19, mounted to turn about a pivot or stud 2O in vsaid stand, the lower end of the carrierhaving jointedto'it at2l (see dotted lines, Fig. 1) a dagger 22,a spring 23, interposed between the'lower end of said carrier and the under side of the ear 17, acting normally to maintain the pivot 2l rin the position represented inFig. -1 of 'the drawings. Preferably below the dagger-carrier 19 and supported by the stand 16 is an electromagnet b, whose armature b', pivoted to the stand 16, is normally heldout ot' contact with the magnet b by means of a spring h2. Said armature carriesa dagger-supporting arm b3, which-when the'loom is`in-normal operating condition su pports said dagger with its end b4 above the path of movement ofthev bunter 28, adj ustably secured tothe bracketA 31, carried by the lay, bymeans of the slot 30 and pins or screws 29.

The electromagnet b -is,^bymeans of the `Wires 19556 b9, in elect-ric circuit with-the bind` ing-posts o7 ha, which when a warp-thread breaks are, by mechanism 'to be hereinafter described, put into electric 'connection to thereby complete the circuit'and establish'a current derived from a'batteryP or any usual source of electrical energy and energize the magnet b. Undersuch condition it'willbe evident that the armature will befdrawn toward the magnet in opposition Ato the spring b2, and its dagger-supporting arm ba'will be moved to'permit the/dagger 22 to fallinto the path ofthe bunter 28 and be moved thereby toturn the dagger-carrier onits pivot 2O and through the knock-off lever 34 to disengagei `the shipperfrom-its holding-notch*inthe extension ai', and thus stop the loom.

It will be evident that should a drop device fall and the circuit be completed, as above describedythe current would continue to flow indefinitely or until the ydrop device 'were raised from its position to completethe'circuit ifsomermeans were not devised-to interrupt the circuit as the loom is stopped, and to this end I havefinterposed a switch or cutout in the circuit between the electromagnet or batteryand the bindingposts 67 bs, which electrical connection, respectively, through the arms d5 d6, with the spring contact-plates d (Z2, which are electrically separated from each other by the insulation @Z7 and from the supportingbracket d bythe insulation d8. Pivotallyconnected to the bracket d bythe vpin CZ isa switch-arm d10, having an'upturned orcamfend d and ca'rryinga-switch or contact-plate d12,'bent uponitself, and the parts of -which are properly'insulated from each otherby` the insulation (113 and also fromfthe switch-arm dlogtowhichit is secured by the screw d, as shown. The switch or contactplate (112 is properly-shapedto enter between the contact-plates d d2 to form electricalcon# `nection between them and 'is normally held between said plates by the spring dlas shown. Secured to theishipper-handle=E, inposition to engage the upturned or cam end of the arm d10V as the shipperis moved to stopthefloom, is ashoe di, whichfas it rides oversaid upturned or-cam end ofthe-.armd forces said arm against theaction of the spring d and withdraws the switch or contact-plate C112 from between'the lcontact-plates d (Z2, and, as in the extreme position 'of Asuch movement. of the shipper `the shoe 'C316 still 'engages the upturned or'cam end of'the arm d10, the vsaid plate E12 will be maintained ont of contact with 'the plates d d2to'elfectually interruptl the vcircuit-and-prevent the passage ofthe electric current-during the'time'theloom is not running.

'In orderto'insure theproper positioning 'of thevdaggerftomeetrthe bunter28, it-is desi'rablethat means be employedto preventa return-ofthe dagger-supporting arm b3 to its -raisedposition'afterfit hasbeen depressed by the completion ofthe-circuit ands-aid circuit hasbeen interrupted bythe movement of the shipper, and to this end there is secured to Ythe loom side, as'here'in represented, a stand 24,havinga projection 25, which constitutes the fulcrum of-a retaining-catch 26, having coperating with it a spring 27, ywhich'acls ynormally to put the upper end -of the latch -intothe-path of movement of the dagger-supporting arm 63. `has a=hook '32, which when the dagger-sup- Atits upper end the latch portingarm hais caused to drop by the movevment of the armature,'dueto'the energization of -the electromagnet h, will catch over-thetop of said arm and retain the same in itslowered position. A'pin35, secured to the stand 24,

limits the movement of the latch under the IOO IIO

impulse of the spring 27, so that it remains in proper position to engage the dagger-supporting arm b3. The lower arm 36 of the latch projects into the path of movement of a lug or cam 12, carried by a yoke 14, secured to the shipper-handle E in a manner such that the stopping movement of the shipper will raise the arm 36, release the dagger-supporting arm h3 from thecatch, and permit the same to rise and carry the dagger again into inoperative position. Thus on completion of the circuit by the drop devices and contacts (to be described) the magnet b is energized, the dagger and its supportingarm b3 are lowered, and the latter is held in such lowered position by catch 26 to enable the dagger to be engaged by the bunter, at which time the shipper is disengaged from its holding-notch and moves to stop the loom. Stich movement of the shipper at once interrupts the current and breaks the circuit through the switch, as above described, thus releasing the armature to its spring b2, and the same movement of the shipper releases the catch 26 from the dagger-supporting arm, as described, and the parts are thus automatically reset.

Preferably in the rear of the loom-frame I provide the drop devices or warp-detectors, which, in connection with a continuously-actuated feeler, complete the circuit when a warp-thread breaks or becomes slack, as will best be understood from Figs. 4 and 5.

Sustained by and pivoted on the stud 43 is the actuator orarm 45, which at its lower end carries a pin 40, on which the initiatory dez the stress of a spring 44, maintains said initiatory device during the normal operation of the loom in line with the actuator, but which, upon an obstruction to the free movement of the lower end of the initiatory device, will permit the latter to turn upon its pivot-stud 40. The upper end of the initiatory device is carried into the axial line of the stud 43, where it is provided with suitable insulation f'.

Mounted upon the cam-shaft A7, Fig. l, is a cam 62, having a cam-groove 6l, in which travels a pin or roller 60, carried by an arm 57, pivoted to the bracket 59 on the stud 58. At its opposite end the arm 57 is provided with a slot 56, which is engaged by a pi u 55, secured to the lower end of a connecting-rod 52, the upper end of which is jointed to the arm 46 through the stud and sleeve 5l, a suitable set-screw 53 being provided to adjustably secure the rod 52 to said sleeve 5l. From the construction thus described it will be obvious that motion of the arm 57, imparted to the arm 46 from the cam 62, will vibrate the actuator 45, and thro ugh the initiatory device will `move the feeler e7 back and forth below the warp drop devices when they are in their normal raised position, and the upper end of the initiatory device carrying the insulation f being in the axial line of the stud 43 will have no movement relative to said stud. Should a warp-thread break or become slack, however, the drop device carried thereby will fall into the path of and obstruct the movement of the feeler e7, whereupon as the actuator 45 continues to move under the actuating infinence of the cam 62, rod 52, and arm 46 the flexing connect-ion between the actuator and initiatory device will cause the upper end of the said device to be moved to one side or the other of the axial line of the stud 43 and complete an electriccircuit by means now to be described. y

Supported on a bracket f2, secured to the loom-frame by a screw or bolt]L13 and insulated therefrom by the insulating material f4,

are the electric contact-plates or positive and' contact-plates or electrodes f5f5 are preferf ably, though not necessarily, formed as a single piece of conducting material and are su pported, preferably, from the under side of the insulating material f4 by the binding-posts b' bs, from one of which, as 67, they are insulated by the insulating-bushingf7, but with the other of which, as bs, they are in electrical connection, as will be apparent from Fig. ll.

The eontact-platesfif6 are preferably supported from the upper surface of the insulating materialf4 and are also secured thereto by the binding-posts 197 198, from one of which, as bs, they are insulated by the insulatingbushing f8, but with the other of which, as 57, they are in electrical connection.

The contact slide-bar flo carries two studs or pinsn n, which embrace between them the upper insulated end f of the initiatory device, and on the side of said bar opposite the pins rt n the said bar carries a pin f, which projects therefrom between the converging ends of the contact-plates ff.

From the construction as above described it will be obvious that so long as the warp.

threads remain in normal condition the upper end j" of the initiatory device being in the axial center of stud 43 will have no relative movement therewith; but should a warpthread break or become too slack the drop device will fall and arrest the movement of the feeler, whereupon the upper end fof the initiatory device will be moved relative to the stud 43 to the right or left, according to the direction of movement at the time of the actuator 45. Such movement of the initiatory device will cause the upper insulated endj" to contact with one or the other of the pins or studs n n and move the contact slide-bar IOO f 10 to 'bring the pin v f' carried thereby into; electrical contact' with one or the other of thel depending ends of the `contacts f6 f6 and, through said pin f, slide-bar f 10, contacts f5 f6, posts (J7 58, and electromagnet h to thereby stop the loom, as hereinbefore explained, and by the movement of the shipper to cut out the? batteryfrom the loom. f,

While I have disclosed the above particular construction of contact-plates,slide-bar, postsLl and coperating parts as the preferred embodi: ment of my invention, it is to be understood that lny invention is not limited thereto, as

lthese parts may be varied through a large range of construction and still be withiuthe scope of my invention, which, among other things, as pointed out, contemplates the stopping of the loom on the arrest of the movable feeler by means of an electric circuit thereby established.

I 'have used in the foregoing speciiication the term contact-plates, they constituting electrodes.

Having thus described my iuvention,what I claim, and desire to secure-by Letters Patent, is-

1. In a warp stop-motion for looms, a series of drop devices maintained in normal position by'warp-threads, a movable feeler, means including an electric .circuit to stop the loom and devices movable on the arrest of the feeler 'to complete the circuit.

2. In a warp stop-motion for looms, a series of drop devices maintained in normal position by warp-threads, a movable feeler, an electric circuit including an electromagnet, devices movable on arrest of the feeler to complete the circuit,'and means under control of said magnet to stop the loom.

3. In a warp stop-motion for looms, a series of drop devices maintained in normal position by warp-threads, a movable feeler adapted to bear-rested by a drop device in its abnormal position, an electric circuit, and means movable on the arrest of the feeler to complete said circuit'and stoppingmechanism under control of said circuit to stop the loom.

4. rIn a warp stop-motion for looms, a series of drop devices maintainedin normal position by warp-threads, a movable feeler adapted to be arrested by a drop device in abnormal position, an electric circuit, means under control of said circuit to stop'the loom, and an initiatory device made movable on the arrest of the feeler to close said circuit.

5. In a Warp stop-motion for looms, a series of drop devices maintained'in normal position by warp-threads, a feeler, and means to move it, said feeler adapted to be arrested by a drop device in abnormal position, an electric circuit, means under control of said circuit to stop the loom, an initiatory device and means insulated from said device and made operative thereby on the arrest of the feeler -in normal position:by'warp-threads, a feeler and means to move it to feel for an abnormally-positioned drop device, an electric circuit, means under control of said circuit to stop the loom, an initiatory device, and a contact-slide insulated from but movable by said device on the arrest of the feeler to complete the circuit.

7. In a loom the following instrumentalities, viz: a shipper-handle, a dagger, a supporting-arm acting to normally hold said dagger in inoperative position,v an electric circuit including an electromagnet,'warp drop dev-ices, a feeler,and ,meansy made operative on the arrest of the feeler to close the circuit and thereby permit the dagger to assume operative'position and stop theloom.

8. In a warp stop-motion for looms, a shipper-handle, a dagger torelease said-shipperhandle,a supporting-arm to hold said dagger in 'inoperative position, a'series of drop devices maintained in normal position by warpthreads, a Lfeeler movable in opposite directions, an electric circuit including an electromagnet, contact-plates,vand a device set in motion by arrest of the feeler'by a drop device in abnormal position, said device coperating with one orthe other of said contactplates according to the direction of movement of the feeler at the time its movement is arrested.

9. In a loom thefollowing instrumentalities, viz: a shipper, means including an electric circuit to free the shipper from its holding-noteh'whena warp-thread breaks or becomes slack, a switch interposed in said'electric circuit, means normally tending to hold the switch closed, and devices carried by the shipper to open theswitch on movement of the shipper' and'acting on one member ofthe switch to stop the loom.

l0.` In a loom the following instrumentalities, viz: a shipper, means including an electric circuit to free the shipper from its holding-notch when a warp-thread breaks or becomes too slack, a switch in said circuit comprising a fixed member and amovable member, a spring for normallyclosing said switch, means on the shipper independent of the switch acting on the said movable member to open the switch against the=tension of the spring as the shipper moves to stop the loom.

ll. In a loom the following instrumentalities, viz: a shipper, a dagger, a supportingarm for said dagger, an electric circuit including an electromagnet for moving the said arm from its supporting position and permitting the dagger to move into position to be struck by a moving part ofthe loom-when a warp-thread breaks or becomestoo slack, and a catch for holding the supporting-arm out of supporting position.

l2. In a loom the following instrumentalities, viz: a shipper,'a dagger, a supportingarm for said dagger, an electric circuit including an electromagnet for moving the said arm from its supporting position and permit- IOO,

IIO

ting thek dagger to move into position to be struck by a moving part of the loom when a warp-thi cad breaks or becomes too slack, and a catch for holding the supporting-arm out of supporting position, and means on the shipper to trip the catch and release the supporting-arm therefrom, as the shipper moves to stop the loom.

13. In a loom, a shipper, a dagger, means to hold it in an inoperative position, an electric circuit, including an electromagnet to place said dagger into an operative position to be struck by a moving part of the loom when the electric circuit is completed by the breaking ot' a warp-thread, and means to retain said dagger in operative position after the circuit is broken.

14. In a loom, a shipper, a dagger, means to hold it in an inoperative position, an electric circuit, including an electromaguet to place said dagger into an operative position to be struck by a moving part of the loom when the electric circuit is completed by the breaking of a Warp-thread, and means to retain said dagger in operative position after the circuit is broken, and means to'restore said dagger to its inoperative position when the shipper is moved.

l5. In a warp stop-motion, a series of drop devices normally suspended on warp-threads, means to detect a drop device in its abnormal position by thev breaking of a warpthread, combined with two contact-plate terminals, or electrodes of an electric circuit, and means outsidey of the drop devices to complete the circuit between the electrodes upon the breaking of the Warp-thread.

16. In a warp stop-motion for looms, a series of drop devices normally suspended on warp-threads, means to detect a drop device in its abnormal position due to the breaking of a warp-thread, combined with two pairs of electrodes of negative and positive poles, and means cooperating, first with one and next with the other pair of electrodes, alternately,to, uponthe breaking of a warp-thread, establish an electric current in the circuit through that pair of electrodes with which its cooperating means is actingat the time of the detection of the drop device in its abnormal position.

17. In an electrical detecting device, consisting of an open electric circuit, a detector mechanism to close the circuit, two pairs of electrodes of the negative and positive poles, means coperating first with one and then with the other pair of electrodes, alternately, to establish au electric current through the circuit through that pair of electrodes through which its coperating means is acting at the time t-he detectorindicates to close the circuit.

In testimony whereof I have signed my name to this specification in the presence of two subscribing Witnesses.

HORACE VYMAN.

Witnesses:

GEO. W. GREGORY, MABEL PARTELOW. 

